I am trying to automate a procedure and when a certain condition is met I would like to notify the user with an automated mail using the **mail** command. The thing is, that the messages are not being send and as far as I understood there are some configurations that have to be made first. The thing is that when I go with

sudo dpkg-reconfigure postfix

in order to modify it I am not completely sure about what to fill there. - 1 - The first page asks for System mail name - 2 - The second one asks for root and postmaster mail recipients - 3 - Other destinations to accept mail - 4 - Force synchronous mail queue Y/N - 5 - Local networks (this was pre-filled) - 6 - Mailbox size - 7 - Local address extension character - 8 - Protocols (ipv6, ipv4)

# I selected them both

But I really need help with 1,2,3,5,7 because when i try to send a test mail I do not receive anything Thank you in advance Update: ### OS info

NAME="Ubuntu"
VERSION="20.04 LTS (Focal Fossa)"

### Postfix version

mail_version = 3.4.10

### postconf

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
compatibility_level = 2
inet_interfaces = all
inet_protocols = all
mailbox_size_limit = 100
mydestination = aoos.homenet.telecomitalia.it, aoos, localhost.localdomain, , localhost
myhostname = aoos.homenet.telecomitalia.it
myorigin = /etc/mailname
readme_directory = no
recipient_delimiter =
relayhost =
smtp_tls_CApath = /etc/ssl/certs
smtp_tls_security_level = may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_security_level = may

### mailq

-Queue ID-  --Size-- ----Arrival Time---- -Sender/Recipient-------
DD866CE073F*    2566 Sun May 10 18:17:10  MAILER-DAEMON
                                         broxigar@aoos

DA34ECE0693*    2493 Fri May 15 19:08:58  MAILER-DAEMON
                                         broxigar@aoos

D474DCE0692*    2531 Fri May 15 19:08:58  MAILER-DAEMON
                                         broxigar@aoos

CFCC4CE0690*    2491 Fri May 15 19:08:58  MAILER-DAEMON
                                         broxigar@aoos

0DC1FCE0738*    2398 Sun May 10 18:05:51  MAILER-DAEMON
                                         broxigar@aoos

D06F9CE0691*    2497 Fri May 15 19:08:58  MAILER-DAEMON
                                         broxigar@aoos

3534ECE068E      417 Fri May 15 17:01:06  broxigar@aoos
(host mx..it[130.192.182.65] said: 452 4.5.2 Could not resolve sender domain. (in reply to MAIL FROM command))
                                         userXXX@.it

## After Edit (postconf -n)

# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# See http://www.postfix.org/COMPATIBILITY_README.html  -- default to 2 on
# fresh installs.
compatibility_level = 2

# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtp_use_tls = yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtp_tls_wrappermode = yes
smtp_tls_security_level = encrypt

#smtp_tls_CApath=/etc/ssl/certs
#smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
#smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
#smtp_sasl_auth_enable = yes
#smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
#smtp_sasl_security_options = noanonymous
#smtp_tls_security_level = encrypt
#smtp_tls_wrappermode = yes


smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
myhostname = aoos.polito.it
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = $myhostname, aoos.polito.it, localhost.polito.it, localhost

#myorigin = $mydomain 
relayhost = [mail.polito.it]:465
#relay_domains = $mydestination
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all

## After Edit (mailq)

-Queue ID-  --Size-- ----Arrival Time---- -Sender/Recipient-------
64428CE10EA*    2334 Fri Jun 19 22:55:27  MAILER-DAEMON
                                         broxigar@aoos

## After Edit (journalctl -xe)

Jun 19 22:55:29 aoos postfix/smtp: 64428CE10EA: to=, relay=server.domain.it[]:465, delay=2, delays=0.01/0/0.03/2, dsn=5.0.0, status=bounced (host server.domain.it[] said: 551 broxigar@aoos failed to route the address (in reply to RCPT TO command))

I Have a Scenario. I have written a shell script who check the space of mount point '/u06'. if free space is greater then 20% then its OK or if free space is less then 20% then it should generate a mail and send it to System Administrator. Our organization is using MS Outlook mailing. I want to know how can I send alerts through my Linux machine to exchange server. How to configure email in Linux?

I'm trying to send an email with an attachment using the command mail but neither option -a nor -A works. * With -a:

-sh
    echo "Please, find attached the report" | mail -s "Report" -r "info@myorg.org" -a report.csv recipient@myorg.org

In this case -a is treated as a header in the email, not as an attachment. * With -A:

-sh
    echo "Please, find attached the report" | mail -s "Report" -r "info@myorg.org" -A report.csv recipient@myorg.org

In this case -A is not recognised as a valid argument to mail. The output is:

invalid option -- 'A'

I don't have mutt command available, so any help with the command mail would be much appreciated.

I tried to block some email addresses from spammers, but this setup doesn't seem to have any effect: smtpd_recipient_restrictions = check_recipient_access hash:/etc/postfix/bad_recipients, permit_sasl_authenticated, permit_mynetworks, ... The emails are still forwarded. Here is an example of the bad_recipients file I have: # When updating, make sure to run this command once: # postmap hash:/etc/postfix/bad_recipients spammer@example.com REJECT When I do a mail to that email address, it still gets forwarded. alexis $ mail -s "Verify block" spammer@example.com Cc: Not much of interest here. ^D When I look at the logs I see something like this: > Mar 5 20:02:37 do postfix/smtp: E827740ADA: to=, > relay=mail.example.com[10.0.0.13]:25, delay=2.3, delays=0.03/0.01/1.8/0.41, > dsn=5.7.1, status=bounced (host mail.example.com[10.0.0.13] said: 550 5.7.1 > No such user! (in reply to RCPT TO command)) _Note: I edited the domain name and IP address._ The relaying to the external source clearly shows that my smtpd_recipient_restrictions settings did not block anything. I'm thinking that either it only accepts domains (although I think [the doc examples here](http://www.postfix.org/RESTRICTION_CLASS_README.html) say otherwise) or I have something else that tells postfix to ignore my list of recipient restrictions. Do you know how to make this feature work?

I used the following code to send an email via shell script. Code: mail -s "subject" toaddress@gmail.com <<< "Body of the mail" It worked. But I want to attach a file while sending the mail. How to do it?

I've been trying to work through sending a html email from mailx on a linux server. Few Notes: - I have to specify a smtp server so therefore I cannot use sendmail (This is not something I can change on my end) - I cannot install 3rd party things such as mutt. I will have to use mail or mailx - Since my mail/x version is heirloom I do not have the --append or -a (attach header options) - not sure if this helps at all but my linux distro is 7.3 (Maipo) What I've seen in most posts on stackoverflow for my case: mailx -v -S smtp=SERVER -s "$(echo -e "This is the subject\nContent-Type: text/html")" -r FROM TO Content-Disposition: inline Message-ID: User-Agent: Heirloom > mailx 12.5 7/5/10 MIME-Version: 1.0 Content-Type: text/plain; > charset=us-ascii Content-Transfer-Encoding: 7bit Hello World Try 2: So I do not want the headers printed out in the body. So I tried to remove the Content-Disposition: inline mailx -v -S smtp=SERVER -s "$(echo -e "This is the subject v2\nContent-Type: text/html\nMIME-Version: 1.0")" -r FROM TO ` > Hello World > ` Try 3: Tried flip flopping content-type and mime-version mailx -v -S SERVER -s "$(echo -e "This is the subject v3\nMIME-Version: 1.0\nContent-Type: text/html")" -r FROM TO X-Priority: 1 (Highest) Message-ID: User-Agent: Heirloom mailx > 12.5 7/5/10 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Hello World After all of this, I've tried many other adaptations of the above tries but they led to no new output. So any suggestions or ideas are gladly accepted! Please keep in mind my constraints listed above...I know they limit my options but that's out of my control. thanks for your time!

How do we add email classification onto mail command on Linux? I'm currently using the following command: mail -s "$(echo - e " Test\From:abc\nContent-Type: text/html")" -S -smtp="SMTP relay server" mailbox edit: If I interpret the original poster's question correctly this would only be for outgoing mail and be similar to Microsoft Outlook which has a **Sensitivity** drop down with choices like unrestricted or third party proprietary TTPI where that syntax seems to just be appended to the mail subject line. Is there a way to make this happen in Linux like it does in Microsoft Outlook? google outlook email sensitivity and look at related pics to get an idea. example: https://www.vumc.org/it/vumc-it-blog/use-sensitivity-labels-outlook-protect-email

Is it possible to delete all mail in which the subject matches a regex pattern? For example, to delete message 1, you do: d 1 But to delete all mail with subject starting with, say, [SPAM], I can't do: d -s "^\[SPAM\].*$"

What is this business about mail and Mail? [On a CentOS box] Why mail does not work but won't return an error either while Mail works fine with the exact same syntax? Mail is basically a link to mail, isn't it? Sorry, this was a mixup, apparently (for historical reasons?!) there is a mail and a Mail Nowadays it looks like they both point to the same thing, on my machine: sr-linux> ls -l which mail -rwxr-xr-x 1 root mail 66492 Jun 24 2001 /bin/mail sr-linux> ls -l which Mail lrwxrwxrwx 1 root root 14 Nov 19 2001 /usr/bin/Mail -> ../../bin/mail

Is it possible to mail an html file that looks exactly like the second image? I know

-e 'set content_type="text/html"' -s "Subject" user@email.com < test.html

works but it sends the html (first image) without the css or "design".

I have 1 million mails generated in a Linux server due to a cron job. I want to delete the mails, but not all as this cron mails useful to troubleshoot and find out the issue with cron job's execution. So I need to keep one month's mail and remove the remaining.

I am trying to run a bash to send emails from my linux server. I am using the following command:

"This is the message body" | mail -s "This is the subject line" -a "From: " -a "To: " -S smtp="smtp.gmail.com:587" -S smtp-use-starttls -S ssl-verify=ignore -S smtp-auth=login -S smtp-auth-user=$SMTP_USER -S smtp-auth-password=$SMTP_PASS

I am receiving the error:

: unrecognized option '-S'

As far as I read, previously mailx was used but this error shouldn't occur with mail command. can you please help me where I am going wrong? System Info: Ubuntu 20.04.5 LTS (GNU/Linux 5.15.0-1040-azure x86_64)

--version

>> mail (GNU Mailutils) 3.7

Install a simple SMTP client: sudo apt install msmtp msmtp-mda Set in msmtprc :: cat .msmtprc account default host smtp.qq.com from x1@qq.com auth on tls on tls_certcheck off user x1@qq.com password xxxx logfile ~/.msmtp.log I can send email with qq account. echo "Testing msmtp " | mail -s "hi root" -r x1@qq.com -- aa@yahoo.com The email can be found in yahoo email. I find a new issue that user can't send email to root in system! echo "cron task work done " | mail -s "hi root" root mail: cannot send message: Process exited with a non-zero status Check the log: Aug 24 20:47:31 host=smtp.qq.com tls=on auth=on user=x1@qq.com from=debian@debian.debian recipients=root@debian.debian smtpstatus=501 smtpmsg='501 Mail from address must be same as authorization user.' errormsg='envelope from address debian@debian.debian not accepted by the server' exitcode=EX_DATAERR echo "cron task work done " | mail -s "hi root" -r debian@debian.debian root The log info: Aug 29 06:56:39 host=smtp.qq.com tls=on auth=on user=x1@qq.com from=debian@debian.debian recipients=root@debian.debian smtpstatus=501 smtpmsg='501 Mail from address must be same as authorization user.' errormsg='envelope from address debian@debian.debian not accepted by the server' exitcode=EX_DATAERR Everytime mail command was called ,it relay to external host smtp.qq.com enven if i specify return host as debian@debian.debian,how can make mail command send email between user and root in the system? I find that postfix or exim4 will be removed when to install msmtp-mda,the fact maybe realted with my issue.

How can I set sender name and email address using mail command in shell script.

#!/bin/bash df -m > myfile server_ip_address=$(ip addr show $(ip route | awk '/default/ { print $5 }') | grep "inet" | head -n 1 | awk '/inet/ {print $2}' | cut -d'/' -f1) if awk '$2 > 10000 && $5 > 90' myfile ; then echo "Disk Full in $server_ip_address" else echo "Nothing wrong with the server" fi When I execute the script, always get disk full as output? Output of df -m looks like this: Filesystem 1M-blocks Used Available Use% Mounted on /dev/mapper/centos-root 949305 512827 436479 55% / devtmpfs 3811 0 3811 0% /dev tmpfs 3823 0 3823 0% /dev/abc tmpfs 3823 18 3806 1% /run tmpfs 3823 0 3823 0% /sys/fs/cgroup /dev/sda2 1014 175 840 18% /boot /dev/sda1 1022 12 1011 2% /boot/efi tmpfs 765 0 765 0% /run/user/2000 The outut of df -m differs from server to server. I am thus comparing if Size>10GB and Use%>90%. As some disk with size<10GB may not be important to be under 90% disk usage. **Update 1:** GNU bash, version 4.2.46(2)-release (x86_64-redhat-linux-gnu) OS is centos 7 Problem with the current code: I need to compare from the second row to last row columns, but my current code is comparing the first rows columns, that's why I suppose it's not working. How to resolve the issue?

I'm trying to host a postfix mail server.I have a box with a fixed IP and also a mx record and spf record that link my box IP to my dns record. I can telnet to alt4.gmail-smtp-in.l.google.com 25 but when I send a mail to me@gmail.com, I still receive this error **mailq**

-Queue ID-  --Size-- ----Arrival Time---- -Sender/Recipient-------
CB502D9735*     389 Tue Jul 18 01:28:17  root@mydomain.com
                                         me@gmail.com

37A54D8C06      389 Tue Jul 18 00:26:34  root@mydomain.com
(conversation with alt4.gmail-smtp-in.l.google.com[74.125.200.26] timed out while receiving the initial server greeting)
                                         me@gmail.com


BBC43D9557      389 Tue Jul 18 01:11:20  root@mydomain.com
(conversation with alt4.gmail-smtp-in.l.google.com[74.125.200.26] timed out while receiving the initial server greeting)
                                         me@gmail.com

telnet alt4.gmail-smtp-in.l.google.com 25


Trying 74.125.200.27...
Connected to alt4.gmail-smtp-in.l.google.com.
Escape character is '^]'.

I've been using SSTMP on a local FreeBSD machine to send stuff like the output of certain cron jobs to my "real" main email account, which is not hosted on the same machine (or even domain). For example, I have a daily cron job set up as so:

smartctl -a /dev/ada0 | grep overall-health | mail -s "Silicon daily smartctl" bob@vesterman.com

This works fine, insofar as the mail being successfully delivered to my "real" email account. However, every time I send a message, I also receive a bunch of warning and bounce messages from my "real" email account's mail system. I found that `mail has a "verbose" flag, -v`, which shows the conversation between my SSMTP and the host of my "real" email account. I tried it out, and noticed the following interesting portion:

[->] RCPT TO:
[] RCPT TO:
[] RCPT TO:
[] RCPT TO:
[] RCPT TO:
[<-] 250 Accepted

So SSMTP is saying that the message should be sent not only to the intended recipient, but also to three other addresses? And one of them is especially weird looking ("/usr/local/sbin/ssmtp@vesterman.com"), and for some reason that one gets *two* RCPT TO lines. I have no idea where these "extra" RCPT TO lines are coming from. Anyone have any idea? Thanks. Contents of my /usr/local/etc/ssmtp/ssmtp.conf:

root=bob@vesterman.com
mailhub=mail.vesterman.com:465
rewriteDomain=vesterman.com
hostname=silicon.vestertopia.net
FromLineOverride=YES
UseTLS=YES
AuthUser=robotsender@vesterman.com
AuthPass=hunter2

I try to see the raw data of a mail that I sent with mail -s "My Subject" me@example.org. Is it possible, if so, how? Expected output is similar to:

From: "root" 
To: me@example.org
Subject: My Subject
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable

My Body

Is there a way to change the ~/mbox file where mailutils's mail program saves read mail and where mail -f reads from to something else, like ~/.mbox for example? I read that setting the MBOX environment variable does this but I tried setting it to both ~/.mbox and $HOME/.mbox and neither did anything for me. For reference, I tried setting MBOX both just by setting it in the current terminal session and by using the env command, and neither worked.

I am trying to use mail command to send 2 attachments. The issue which i am facing is unable to send attachment and mail body content. tried following command

echo "Hello World" | mail -s 'Test Email' -A test.csv -aFrom:no-reply@test.com abcd@test.com

cat README.txt | mail -s 'Test Email' -A test.csv -aFrom:no-reply@test.com abcd@test.com

mail -s 'Test Email' -A test.csv -aFrom:no-reply@test.com abcd@test.com < README.txt

Whereas I send mail body alone then mail is received with body

mail -s 'Test Email' -aFrom:no-reply@test.com abcd@test.com  < README.txt

How to send both attachment and mail body (README.txt in mail body and test.csv in attachment)?